Ribbon cassette



FIG. 1 is a perspective view taken from the top, rear, and left side of a ribbon cassette showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective view taken from the top, rear and left side of a modified form of the ribbon cassette shown in FIG. 1;

FIG. 9 is a right side elevational view of FIG. 8;

FIG. 10 is a rear elevational view of FIG. 8;

FIG. 11 is a left side elevational view of FIG. 8;

FIG. 12 is a top plan view of FIG. 8;

FIG. 13 is a front elevational view of FIG. 8; and

FIG. 14 is a bottom plan view of FIG. 8. 

The ornamental design for a ribbon cassette, as shown and described. 